Abstract: Plastic woven bags are widely used in various industries. Because of their good tensile properties, they can carry and effectively protect high quality products and meet the needs of consumers. Therefore, the woven bag body should be protected from damage and can be used normally. In this paper, Labthink's self-developed XLW (PC) intelligent electronic tensile testing machine is used to test the tensile properties of plastic woven bag samples, and to test the plastic woven bag for the enterprise through the description of the test process and equipment parameters and principles. The tensile strength performance provides a reference.
Keywords: plastic woven bag, breakage, tensile properties, flexibility, tensile strength, intelligent electronic tensile testing machine
Meaning
The plastic woven bag mainly includes a polypropylene bag and a polyethylene bag. The main production process is to use a plastic raw material to extrude a film, cut, and uniaxially stretch into a flat yarn, and obtain a product through warp and weft knitting. Currently widely used in the packaging of food, daily necessities, fertilizers, chemical products, etc.
The flexibility of the plastic woven bag can be judged by testing the tensile strength (tensile strength) of the bag to verify whether the plastic woven bag meets the packaging requirements of the product. If the plastic woven bag body has low tensile strength, that is, the bag body has poor flexibility, the bag body is easily damaged and leaked during storage and circulation, which not only causes leakage of the package contents, but also reduces the situation. The life of plastic woven bags, so manufacturers should strengthen the test of tensile strength of plastic woven bags.
Figure 1 Various types of plastic woven bags
2. Test samples
This test uses a plastic woven bag provided by a company as a sample.
3. Detection basis
For the test standards of plastic woven bags, refer to GB/T 1040.3-2006 "Determination of tensile properties of plastics - Part 3: Test conditions for films and sheets".
4, test equipment
Jinan Languang Electromechanical Technology Co., Ltd. independently developed and designed the XLW (PC) intelligent electronic tensile testing machine.
Figure 2 XLW (PC) intelligent electronic tensile testing machine
4.1 Test principle
The sample is clamped between the two chucks of the clamp, and the two chucks are moved relative to each other. The force value sensor and the built-in displacement sensor on the movable chuck are used to collect the force value change and displacement during the test. The change is made to calculate the tensile, tearing, deformation rate and other performance indexes of the sample.
4.2 Scope of application
(1) This equipment can be used for tensile properties, tensile strength, tensile strength and deformation rate, tear resistance, puncture resistance, peel strength performance, heat sealing of plastic film, composite film, sheet, woven bag and other materials. Test of strength and other indicators; can be used for infusion bag cover, soft rubber stopper, oral liquid cap puncture / pull force test; can be used for tape unwinding force, plastic bottle anti-pressure, combination cover and jelly cup, yogurt cup cover Testing of product and packaging properties such as film opening force.
(2) This equipment can meet GB/T 10004, ISO 37, GB 8808, GB/T 1040.1, GB/T 1040.2, GB/T 1040.3, GB/T 1040.4, GB/T 1040.5, GB/T 4850, GB/ T 12914, GB/T 17200, GB/T 16578.1, GB/T 7122, GB/T 2790, GB/T 2791, GB/T 2792, GB/T 17590, ASTM E4, ASTM D882, ASTM D1938, ASTM D3330, ASTM F88, ASTM F904, JIS P8113, QB/T 2358, QB/T 1130 and other related standards at home and abroad.
4.3 Equipment parameters
Force sensors of 500 N and 50 N are available.
According to the relevant standards, the equipment provides seven test speeds of 50 mm/min, 100 mm/min, 150 mm/min, 200 mm/min, 250 mm/min, 300 mm/min and 500 mm/min, according to the test standard. Require free setting.
The long stroke of 1000 mm can be used to test materials with large deformation rates.
Intelligent configuration such as limit protection, overload protection, automatic return and power-down memory to ensure the user's operation safety.
A test machine integrates seven independent test procedures, such as stretching, peeling, puncture and tearing, to provide users with a choice of various test items.
Support LystemTM laboratory data sharing system to manage test results and test reports.
5. Test process
(1) Cut 5 specimens each with a width of 50 mm and a length of 200 mm along the transverse and longitudinal directions of the sample of the plastic woven bag with a cutter.
(2) The two ends of the sample are respectively clamped on the upper and lower chucks of the device, and the long axis direction of the sample should coincide with the center line of the upper and lower clamps.
(3) Set parameter information such as test speed and sample width.
(4) Click the test start option and the test starts. The instrument automatically calculates and displays the final test results.
6. Test results
The transverse average breaking force (ie tensile strength) of the plastic woven bag samples tested in this test was 386.507 N/50 mm; the longitudinal average breaking force was 398.011 N/50 mm.
7. Conclusion
XLW (PC) intelligent electronic tensile testing machine is a professional testing equipment for the tensile properties of plastic woven bags. It has high test accuracy and good repeatability of test results, which can truly reflect the flexibility of plastic woven bags. Labthink has been committed to providing professional testing services and equipment to customers around the world, providing customers with a large number of packaging material performance data references. At the same time, to provide customers with reliable technical solutions. For more information on related test instruments, you can log in to view specific information. Labthink is looking forward to enhancing technical exchanges and cooperation with users in various industries.
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